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A closely wound solenoid 80 cm long has 5 layers of windings of 400 turns each. The diameter of the solenoid is 1.8 cm. If the current carried is 8.0 A , estimate the magnitude of vecB inside the solenoid near its centre. |
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Answer» Solution :As the solenoid has 5 LAYERS of WINDINGS of 400 turns each, it means `N = 5 XX 400 = 2000`. Further `l = 80 cm = 0.8 m and l = 8.0 A` `:.` Magnitude of `vecB` inside the solenoid near the CENTRE `B = mu_0 n I = mu_0 N/l I = (4 pi xx 10^(-7) xx 2000 xx 8)/(0.8) = 2.5 xx 10^(-2) T`. |
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